paracyanogenn.
/ˌparəsʌɪˈanədʒ(ə)n/, U.S. /ˈˌpɛrəˌsaɪˈænədʒ(ə)n/, /ˈˌpɛrəˌsaɪˈænəˌdʒɛn/ Chemistry.
A solid polymer of cyanogen formed in small quantities when cyanogen is prepared, e.g. by heating mercury( ii) cyanide.
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the world > matter > chemistry > organic chemistry > organic radicals > [noun] > radical compounds (general) > radical compounds (named)
paracyanogen1844
nitrile1848
adiponitrile1902
tris1976
1844 G. Fownes Man. Elem. Chem. iv. 449 Paracyanogen.—This is the brown or blackish substance..which is always formed in small quantity when cyanogen is prepared by heating the cyanide of mercury.
1864 H. Spencer Princ. Biol. I. 7 In paracyanogen, formed of the same proportions of these elements in higher multiples, we have a solid which does not fuse or volatilize at ordinary temperatures.
1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 38 On heating, it [sc. silver nitrate] decomposes into metallic silver, cyanogen, and paracyanogen.
1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) viii. 248 Impure (CN)2 can polymerize on heating to give a polymer, paracyanogen, which will depolymerize above ≃850°C. Interaction of KCN and ICN gives a linear paracyanogen.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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n.1844